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  <title>返回字符的 ASCII 码值</title>

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</div><hr /><div id="function.ord" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ord</h1>
  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">ord</span> &mdash; <span class="dc-title">返回字符的 ASCII 码值</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.ord-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">int</span> <span class="methodname"><strong>ord</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$string</code></span>
   )</div>

  <p class="para rdfs-comment">
   返回字符串 <em><code class="parameter">string</code></em> 第一个字符的 ASCII 码值。
  </p>
  <p class="para">
   该函数是 <span class="function"><a href="function.chr.html" class="function">chr()</a></span> 的互补函数。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.ord-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">string</code></em></dt>

     <dd>

      <p class="para">
       一个字符。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.ord-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回整型的 ASCII 码值。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.ord-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4756">
    <p><strong>Example #1 <span class="function"><strong>ord()</strong></span> 范例</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$str&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />if&nbsp;(</span><span style="color: #0000BB">ord</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">)&nbsp;==&nbsp;</span><span style="color: #0000BB">10</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"The&nbsp;first&nbsp;character&nbsp;of&nbsp;\$str&nbsp;is&nbsp;a&nbsp;line&nbsp;feed.\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>   
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.ord-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.chr.html" class="function" rel="rdfs-seeAlso">chr()</a> - 返回指定的字符</span></li>
    <li class="member"><a href="http://www.asciitable.com" class="link external">&raquo;&nbsp;ASCII 码表</a></li>
   </ul>
  </p>
 </div>


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